216422868 has 24 divisors (see below), whose sum is σ = 506090368. Its totient is φ = 71983296.

The previous prime is 216422867. The next prime is 216422909. The reversal of 216422868 is 868224612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216422867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13921 + ... + 25032.

Almost surely, 2^216422868 is an apocalyptic number.

It is an amenable number.

216422868 is an abundant number, since it is smaller than the sum of its proper divisors (289667500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216422868 is a wasteful number, since it uses less digits than its factorization.

216422868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39423 (or 39421 counting only the distinct ones).

The product of its digits is 73728, while the sum is 39.

The square root of 216422868 is about 14711.3176840146. The cubic root of 216422868 is about 600.3912892102.

The spelling of 216422868 in words is "two hundred sixteen million, four hundred twenty-two thousand, eight hundred sixty-eight".